Warp stop-motion for looms



(No Model.)

0. SMITH.

H WARP STOP MOTION FOR LO0MS.

No. 557,906. Patented A r. 7, 1896.

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OBERLIN SMITH, OF BRIDGETON, NE? JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE NORTHROP LOOh-l COMPANY, OF HOPEDALE,

MASSACHUSETTS.

WARP STOP-MOTION FOR LQOMS.

SPECIFICATION forming part of Letters Patent No. 557,906, dated April *7, 1896. Application filed January 25, 1894. Serial No. 498,008. (No model.)

To aZZ whom, it may concern.-

Be it known that I, OBERLIN SMITH, of Bridgeton, county of Cumberland, State of New Jersey, have invented an Improvement in arp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings represent-in g like parts.

This invention relates to warp stop-motions of the class wherein a series of detectors are arranged in position to be acted upon and moved by the unbroken warp-threads, failure of a detectorto be so moved operating, through suitable mechanism, to stop the loom.

In the stop-motion forming the substance of this invention I have arranged the detectors at the back of the loom preferably close to and working in cooperation with the whiproll, over which the warp-threads are passed.

The preferred construction of mechanism, together with the advantages resulting from the use of a stop-motion embodying this invention, will be more fully hereinafter described, and pointed out in the claims.

In the drawings, Figure 1 represents in vertical section a suflicient portion of a loom equipped with a stop-motion embodying this invention; Fig. 2, a partial top view showing several of the detectors on an enlarged scale; Fig. 3, a section on the dotted line 5000, Fig. 2.

Referring to the drawings, the frame A, lay L, hand-rail B, reed r, heddles 71 71, and leaserodsZ Z are and may be of any usual or desired construction.

In the embodiment of my invention herein shown the whip-roll a is supported at its ends in suitable castings a each rovided with an outwardly-turned lug or boss a, shaped to fit and rest in suitable sockets or bearings a in the frame.

The whip-roll a may be of any desired shape, construction, or material and formed integral with or independent of but carried by the end castings a. The brackets a, as herein shown,

7 are provided with stop-lugs a which rest upon or bear against the loom-frame (see Fig. 2) and prevent the said brackets from turning or swinging on their lugs (F. A rod 1), extended between the brackets a, constitutes a pivot-rod for and on which are mounted the several warp-detectors cl, said detectors, as herein shown, having rearwardly-extended arms (2, forked at d at their outer ends to re ceive the warp-threads 10, as shown. The forked arms d of the alternate detectors are made longer than the arms d of the intervening detectors, in order that the forked ends may be made as wide and strong as possible, the said arms in each case being counterbalanced by weighted heads (1*, tending to turn the detectors into their dotted positions, Fig. 1. A rod 1), arranged below the pivot-rod 'b, and also extended between the castings a, serves as a stop to arrest downward movement of the detectors toward and into their dotted positions.

A feeler F, extending along and beneath the entire series of detectors, has its downturned ends f, one only of which is shown, pivoted at f to the castings a, (see Fig. 1,) a stop-pin f serving to limit the vibratory movements of the feeler in each direction.

A spring 5, attached to the loom-frame and to one of the arms f of the feeler, acts to draw the latter back into its position, Fig. 3, said spring, as shown herein, operating when the lay is in its rearmost position.

In the present construction the feeler is turned about its pivots toward the detectors by a flexible connection 6-, attached at oneof its ends to one of the arms f and passing under and about a pulley 6 (shown as on the lay) is attached at its opposite end to a dagger e pivoted at 6 as herein shown, to the front of the hand-rail R and normally held in its elevated position, as shown, by a spring e*. The pivot end of the dagger is squared, as shown, or otherwise adapted to cooperate or contact with the hand-rail to limit the up and down pivotal movements of the dagger.

N is a switch plate or actuator, shown as pivoted to a knock-off N so positioned that when moved to the left, Fig. 1, it will act upon and release the usual shipper (not shown) or otherwise cooperate with suitable usual mechanism to stop the loom, said knock-off constituting an actuator for the stopping DISC/l)- anism. The operation of the stop-motion is asffollows, viz: The spring (2*, being strongei? than the spring 3, holds the dagger normally in its elevated fullline position, Fig. 1, in which position it will at each forward beat of the lay pass above and free from engagement with the upturned end a of the switchN, the connection e at each beat of the lay acting through the arm f of the feeler-to move the latter back under the heads of the several detectors held in their raised full-line positions by the unbroken warp-threads passing through their forked arms, as shown in Fig. 1. \Vhen a warp-thread breaks or becomes excessively loose, it will fail of holding its detector down in its full-line position, Fig. 1, the weighted head of such detector causing the latter to be turned into its dotted position, Fig. 1, with said head lying in the path of movement of the feeler F, as in Fig. lVith a detector in this position as the lay moves forward to beat in a weft the connection 6 between the lay and the feeler moves the latter toward the head of the fallen detector, which latter obstructs the feeler and prevents it being turned through its full movement, thereby exerting a pull on the connection 6 to draw the dagger 6 down into its dotted position, Fig. 1, where it will strike the switch or actuatorh and push it and the knock-oif N to the left to stop the loom. lhe broken thread having. been mended the loom is again started, it continuing in its operation until another thread breaks, when the loom will be stopped in like manner.

The advantages of a stop-motion embodying this present invention may be briefly statedas follows, viz: its extreme simplicity; the great amplitudeof vibration of the detectors, which permits the warp-threads to be quite slack without stopping the loom; the location of the detectors back of the probable breaking-point of the threads, whereby the end of the broken thread at the rear of the break remains in the forked end of the detector to be easily picked out and knotted; the accessibility of the detectors, the position of each thread being clearly visible and the thread placed in a detector by passing it between two neighboring detectors, and, lastly, each individual detector acts as a tightener upon its warp-thread to keep the same uniformly tight until the loom is stopped, thereby improving the quality of the cloth woven.

This invention is not restricted to the particular mechanism herein shown, for the same obviously may be varied without departing from thespirit and scope of the invention.

In case the'beat of the lay should be such that with the pulley e in its position shown the feeler would have too much throw, or there should be too much slack in the connection e,then the said pulley may be placed nearer the axis of the lay and the throw thereby reduced.

I claim 1. A warp stop-motion for looms containing the following instrumentalities, viz: awhiproll, a series of pivoted warp-detectors arranged contiguous thereto and resting at one side of their pivots in constant contact with the warp-threads and provided at the opposite side the pivots with weighted heads topress said detectors against said threads; a support for said detectors; a feeler and means to move the same toward and from and to cooperate with said heads; and stopping mechanism actuated by said feeler, substantially as described.

2. Awarp stop-motion for looms containing the following instrumentalities, viz: a frame; a lay; a series of warpdetectors in contact with the unbroken warp-threads; a stationary support for said detectors and on which they are pivoted; a feeler movable relatively to and cooperating with said detectors supports independent of said lay for said feeler; connections between the said feeler and lay whereby the former is moved by the latter; and a stopping mechanism for the loom comprising cooperating parts 011 said lay and loomframe and actuated by said feeler, substantially as described.

3. A warp stop-motion for looms containing the following instrumentalities, viz: a lay; a series of warp-detectors in contact with the unbroken warp-threads; a stationary support for said detectors; a feeler movable relatively to and cooperating with said detectors; supports independent of. said lay for said feeler; connections between the said feeler and said lay whereby the former is moved by the latter; a dagger on said lay connected with and moved by said feeler; and acooperating actuator on the loom-frame, movement. of which eifects stopping of the loom, substantially as described.

4. A warp stop-motion for looms containing the following instrumentalities, vizza lay; a series of warp-detectors in contact with the unbroken warp-threads; a stationary support for said detectors; a feeler movable relatively to and cooperatingwith said detectors; a dagger on the lay; a flexible connection joining said dagger and feeler; a spring acting upon said dagger to maintain said connection always taut; and a movable actuator on the loom-frame, cooperating with said dagger to stop the loom upon breakage of a thread, substantially as described.

5. A warp stop-motion for looms containing joining said dagger andfeeler; springs acting name tothis specification in the presence of upon said dagger and feeler respectively to two subscribing witnesses. maintain the said connection taut; and a movable actuator on the loom-frame, cooperating OBERLIN SMITH. 5 with said dagger to stop the 100m upon break- YVitnesses:

age of a thread, substantially as described. JAMES J. REEVES, In testimony whereof I have signed my HUGH L. REEVES. 

